Take-up device for circular-knitting machines



Aug. 18,1925. 1,550,056

E. BARTH TAKE'UP DEVICE FOR CIRCULAR KNITTING MACHINES Filed Aug. 20, 1923 ception of the rods.

Patented Aug. 18, 1925 mrrsn stares anna ERIGI-I BARTH, 0F GHEMNITZ, GERMANY.

TAKE-U1? DEVICE FOR CIRCULAR-KNITTING MACHINES.

Application file-o1 August 20, 1923. Serial No. 658,423.

To all whom it may concern:

Be it known that I, Enron BARTH, a citizen of the German Republic, residing at Chemnitz, Germany, have invented certain new and useful Improvements in Take-Up Devices for Circular-Knitting Machines, of which the following is a specification.

In circular knitting machines having rotating needle cylinder, the take-up rollers are mounted in a frame which revolves with the cylinder, and they are operated by a worm wheel gear which receives motion from a pinion meshing with a stationary circular rack, the movement of the rollers be ing regulated automatically according to the tension of the work through the medium of a friction clutch.

The object of the present invention is to modify this device for use in machines in which the cam ring is rotatable as well as the cylinder, and the invention consists in the provision of a rotatable circular rack which receives its motion independently of the needle cylinder, sothat the take-up rollers will be operated whether the needle cylinder is in motion or not.

Fig. 1 of the accompanying drawings represents a vertical section of the device, and

Fig. 2, a plan of the same.

The machine is provided with a needle cylinder and cam ring, both of which are rotatable and operated according to the nature of the work. For instance, while the cam ring is continuously rotated, the needle cylinder may be rotated intermit tently for the production of a spiral pattern.

The take-up rollers 9 are mounted so as to follow the movements of the needle cylinder in known manner. For this purpose the take-up mechanism is carried by a rotatable ring 7 which is connected by means of rods 3 to the base ring 2 of the needle cylinder, the rings 2 and 7 being provided with bosses 5 and 6 respectively for the re- The ring 7 carries a bearing for a vertical shaft 16 on which is mounted a friction clutch 15. The shaft is also fitted with a pinion 10 which, as it follows the angular displacement of the needle cylinder, remains continually in mesh with a circular rack 10. A, frame 13, which is hinged at 13 to the ring 7, carries the take-up rollers 9 one of which has on its shaft a worm wheel 20. The latter meshes with a worm 21 which is mounted on a vertical shaft 14 arranged as nearly as possible co-axially with the shaft 16. A friction cone 15" on the shaft 14L fits the clutch 15 and bears normally against the latter so as to transmit motion to the worm gearing and to the take-up rollers. When the feed of the work which passes between the rollers 9, does not keep pace with the movement of the rollers 9, the latter climb on the work and thus tend to loosen the engagement of the clutch elements. The latter slip as a. consequence, thereby regulating the take-up motion in known manner.

,In the ordinary machines the rack 10 is stationary, and the pinion 10 is rotated owing to its travel around the rack. According to the invention the rack is fitted rotatably in the machine frame 8 and provided with crown teeth whereby it meshes with a bevel gear 17. The latter is mounted on a shaft 18 which receives motion, for instance through the medium of a belt drive 19, independently of the ring 7 so that the pinion 16 will be rotated whether it travels round together with the needle cylinder or remains in the same position.

The belt drive 19 may receive motion from the shaft 22 which drives the cam ring 12 through the medium of a bevel gear 23 thus, in cases when the needle cylinder and the cam ring are operated alternately, the

pinion 16 will be kept in rotation either by the movement of the rack or by its own travel around the rack.

I claim:

In a circular knitting machine in which the needle cylinder and the cam ring are both rotatable, the combination with atake- .up mechanism which remains stationary relative to the needle cylinder, of a rotatable circular rack arranged so as to be permanently in gear with the take-up mechanism for driving the same by the relative displacement of the two elements, and means for imparting motion to said rack so that such relative displacement will take place whether the cylinder moves relative to the cam ring or vice versa.

ERICH EARTH. 

